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Mechanism of H2 Evolution from a Photogenerated Hydridocobaloxime
Abstract
Proton transfer from the triplet excited state of brominated naphthol to a difluoroboryl bridged Co(I)-diglyoxime complex, forming Co(III)H, was monitored via transient absorption. The second-order rate constant for Co(III)H formation is in the range (3.5-4.7) × 10(9) M(-1) s(-1), with proton transfer coupled to excited-state deactivation of the photoacid. Co(III)H is subsequently reduced by excess Co(I)-diglyoxime in solution to produce Co(II)H (k(red) = 9.2 × 10(6) M(-1) s(-1)), which is then protonated to yield Co(II)-diglyoxime and H(2).
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Cited by
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Self-citationThoi, V. S., Sun, Y., Long, J. R., & Chang, C. J. (2013) · Chem. Soc. Rev. · doi:10.1039/c2cs35272a · Cited by 668
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Stubbert, B. D., Peters, J. C., & Gray, H. B. (2011) · Journal of the American Chemical Society · doi:10.1021/ja2078015 · Cited by 272
Self-citationSingh, W. M., Baine, T., Kudo, S., Tian, S., Ma, X. A. N., Zhou, H., DeYonker, N. J., Pham, T. C., Bollinger, J. C., Baker, D. L., et al. (2012) · Angewandte Chemie · doi:10.1002/ange.201200082 · Cited by 66
Metadata
- Authors
- Dempsey, J. L., Winkler, J. R., & Gray, H. B.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-11-10
- Volume
- 132
- Issue
- 47
- Pages
- 16774-16776
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2048813202
- Cited by
- 225
- References
- 0
- FWCI
- 14.86
- Type
- journal article
- Language
- en
- Open access
- closed
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- Dempsey, J. L., Winkler, J. R., & Gray, H. B. (2010). Mechanism of H2 Evolution from a Photogenerated Hydridocobaloxime. Journal of the American Chemical Society. https://doi.org/10.1021/ja109351h
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